701
CXUS55 KRIW 021622
CLMCPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1013 AM MDT FRI MAY 02 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR CASPER FOR THE MONTH OF
APRIL 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2025 WILL BE
AVAILABLE IN APPROXIMATELY 60 DAYS FROM THE NATIONAL CENTERS FOR
ENVIRONMENTAL INFORMATION (HTTP://WWW.NCDC.NOAA.GOV/CDO-
WEB/DATASETS). UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE
INTERNET AT HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW
..APRIL WAS COOLER AND WETTER THAN NORMAL FOR CASPER
AVERAGE TEMPERATURE FOR CASPER IN APRIL WAS 41.4 DEGREES WHICH IS
0.9 DEGREES BELOW NORMAL. THE WARMEST READING OF THE MONTH WAS 80
DEGREES ON THE 11TH AND BROKE THE 2012 RECORD OF 78. THIS ALSO SET A
NEW RECORD FOR EARLIEST 80-DEGREE DAY FOR THE YEAR. PREVIOUSLY IT
WAS THE 16TH OF APRIL SET IN 1994. THE HIGH OF 77 ON THE 12TH BROKE
THE 1992 RECORD OF 75. THE COLDEST READING FOR THE MONTH WAS 13
DEGREES ON THE 5TH AND 14TH.
TOTAL PRECIPITATION FOR THE MONTH WAS 1.59 INCHES...WHICH IS 113
PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH WAS
ON THE 17TH-18TH WITH 0.46 INCHES. NO PRECIPITATION RECORDS WERE
BROKEN THIS MONTH.
SNOWFALL FOR THE MONTH WAS 7.7 INCHES...WHICH IS 73 PERCENT OF
NORMAL. THE SNOWIEST 24-HOUR PERIOD WAS THE 17TH-18TH WITH 4 INCHES.
THERE WERE NO SNOWFALL RECORDS BROKEN THIS MONTH. THE HIGHEST WIND
GUST WAS 54 MPH FROM THE WEST ON THE 9TH.
..THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 84 04/30/1992
LOW -6 04/12/1997
HIGHEST 80 04/11
LOWEST 13 04/05
04/14
AVG. MAXIMUM 57.4 56.3 1.1
AVG. MINIMUM 25.4 28.2 -2.8
MEAN 41.4 42.3 -0.9
DAYS MAX >= 90 0
DAYS MAX <= 32 1
DAYS MIN <= 32 23
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.75 1941
MINIMUM 0.08 1992
TOTALS 1.59 1.41 0.18 1.22
DAILY AVG. 0.05 0.05 0.00
DAYS >= .01 9
DAYS >= .10 6
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.46 04/17 TO 04/18
STORM TOTAL 0.41
SNOWFALL (INCHES)
TOTALS 7.7 10.5 -2.8
SINCE 7/1 26.2 69.1 -42.9
SNOWDEPTH AVG. 0
DAYS >= 1.0 3
DEGREE DAYS
HEATING TOTAL 700 682 18
SINCE 7/1 6564 6953 -389
COOLING TOTAL 0 0 0
SINCE 1/1 0 0 0
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 11.0
RESULTANT WIND SPEED/DIRECTION 3/280
HIGHEST WIND SPEED/DIRECTION 39/290 DATE 04/09
HIGHEST GUST SPEED/DIRECTION 54/280 DATE 04/09
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.35
NUMBER OF DAYS FAIR 17
NUMBER OF DAYS PC 8
NUMBER OF DAYS CLOUDY 5
AVERAGE RH (PERCENT) 62
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 1
LIGHT RAIN 8 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 2
LIGHT SNOW 6 SLEET 0
FOG 12 FOG W/VIS <= 1/4 MILE 1
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO MAY 2025. THE AVERAGE HIGH TEMPERATURE ON THE FIRST
OF THE MONTH IS 60 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 32
DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 73
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 42. THE AVERAGE MONTHLY
PRECIPITATION IS 2.21 INCHES. THE AVERAGE SNOWFALL IS 2.6 INCHES.
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